Construction form for concrete floors



Jan. 11, 1949. J. J. PIRZ CONSTRUCTION FORM FOR CONCRETE FLOO RS 6 Sheets-Sheet 1 Filed March 13, 1947 INVENTOR. Jop'eph .Z Pirz.

Jam'll, 1949. J, J P|RZ 2,459,044

CONSTRUCTION FORM FOR CONCRETE FLOORS Filed March 13, 1947 6 Sheets-Sheet 2 ATTOMLXST Jan. 11, 1949. J. J. PIRZ CONSTRUCTION FORM FOR CONCRETE FLOORS Filed March 15, 1947 s Sheets-Sheet s J m JP:

Jjan. 11, 1949.

' J. J, PIRZ CONSTRUCTlON FORM FOR CONCRETE FLOORS s Shts-Shegb 4 Filed March 13, 1947 & Z

IN VENTOR.

4 T Ton/mm- Jan. 11,- 1949. J. J. PlRZ 2,459,044

CONSTRUCTION FORM FOR CONCRETE. FLOORS Filed March l5, 1947 e Sheets-Sheet 6 INVENTOR. Japan .Ifz'rz ATTORNE'I7S'.

Patented Jan. 11, 1949 UNITED sTArEs PATENT" crimes V oonsmoo'rlon FORM- FOR CONCRETE FLooRs rusephfrrirzjrlusnin N.. Application March 13, 1947, .SerialNo. 734,340

This invention relates to the construction of concrete floors. More particularly, the invention resides "in the provision of readily assembled and demoun-table pouring forms ior repeated use on successive jobs or successive parts of the same job.

An important object of the invention is to provide concrete forms 'by which concrete structures may be 'e-ifici'entlv and rapidly produced, with consequent economy. A further object of the invention is to provide ior'the rapid assembly and disassembly of the forms, and toenable them to be repeatedly used with minimum wear and tear and replacement of parts.

In the construction of concrete floors, my invention contemplates the attachment and sup.- port of the forms to the steel. beams and of the conventional building framework; Thus the steel floor beams have hung upon them the beam-form units toreceive theconcreteby which the beams are enclosed, andthese 'nnitssupport the floor :forms which extend from heam'to beam for receiving the concrete which is to form the floor. The various parts of. the beam-enclosing form units are so constructed that they are secured in place on the :beam by assembly members applied and. -'disconnected from "below, without having to disturb the set concrete 'when'it is time to remove them, as will become clear from.

tion, illustrating the application of an .implement for locking together the bottom channel and aside wallof afloor term.

Figure 8 is a similar view showing the .imple-, ment at the completion of. its locking-operation.

Figure l is a detail section through a part of the implement and the parts being secured together, as viewed on the line 4-4 of .FigureB;

Figure 5 is adetail sectional elevation through another portion of the ,parts being secured to gather, illustrating the use of an intermediate locking member of difierent. construction from that shown in Figures 3 and 4.

Figure '6 is a horizontal section of the details shown in Figure 5, as viewed on the line 6-6 thereof.

Figure 7 a, top planv-iew, with parts broken away, illustrating one embodiment :ofpa two-part floor section form extending from beam to beam 3 Claims. (Cl. 25-13 15) .2. for receiving the concrete which is to form the floor.

Figure 8 is a side elevation thereof.

Figure '9 is a detail sectional elevation thereof on theline 9'-9 of'Fi-gure '7, showing the securing together of the adjacent portions or two of the floor forms. 1

Figure 10 is an underneath view of the parts shown in Figure 9.

Figure 11 is a perspective view of a, unitary all-metal floor or wall" form.

Figure 12 is a cross-section thereof on the line il -l2 of Figure 11;

Figures 13 and 14 are similar cross sections of wall or floor forms embodying alternative types of walls formedby folding the edges of the sheet metal web.

Figure 15 is a cross-sectional elevation through the lower portion of a modified construction of beam form to extend the concrete fill beneath the steel beamor girder.

Figure 16 is a detail sectional view one line l6l6 of Figure 15; illustrating in cross section the metal spacers. employed for registering the form with the steel beam, and

Figurelfl is a perspective view, with parts broken away, illustrating theconstruction and assembly of wall forms to produce a concrete wall simulating on its outer face a clapboard wall.

As previously indicated, the forms comprise in generalthe beam forms, immediately associated with the steel beams or girders, and the floor forms which extend across the space between the beam forms. Referring to Figures 1 and 3;

- '20" indicates the steel 'I-beams of any standard to the respective side "walls by welding or other conventional means,-to provide supports for the floor forms, as will later be seen. The web portion 2| of the inverted channel is perforated" at 30, 3 1, at intervals along its length to receive suspension wires "32 which are hung over the top of the 'I-beam and extend through the perfora tions '30, '3I into the space beneath the-web, adjacent the inner surfaces of the flanges 2'2, 23.

These flanges 22, 23 are recessed at 33, 34 in registry with similar recesses, 35, 36 in the adjacent side walls 26, 21. By deflecting the depending ends of the suspension wires 32 outwardly through the registered recesses 33, 35 and 34, 36, as shown for example in the right-hand side of Figure 3, the inverted channel and the adjacent side walls, which constitute the beam form, are secured together and to the I-beam 20 by which they are supported. Any suitable tool or implement may be employed to deflect a loop of each end of the suspension wire 32 outwardly through the registering recesses mentioned. I have illustrated in Figures 2 and 3 an implement suitable for this purpose which is described and claimed in my copending application, Serial No. 106,640, filed October 30, 1946. This implement comprises a main body portion 31 on which are mounted the operating parts of the flange and wall-engaging and the wire-bending members. Extending rigidly from this main body 31 is a hand lever or arm 38 which is grooved or recessed at 39 to receive a toggle link 40 and at 4! to receive a jaw member 42. One end of the link 40 is pivoted to the arm 38 at 43, and the jaw member 42 is pivoted to the arm at 44. The jaw member 42 is of T-section at its gripping face 45, and is slotted at 45 to receive the cross pin 41 of its actuating lever 48, which lever is bifurcated or forked at the end to embrace the jaw member. An adjustable screw '49 threaded in the boss or enlargement 50 extends into the slot 45 to provide an adjustable limit stop. The toggle link 40 is connected with the actuating lever 48 by means of a fulcrum pin !,the link being disposed in a groove or recess 52 formed in the lever 48. The lever system described constitutes a toggle for actuating and locking the jaw member 42 upon the outer face of the side wall "21 against the pressure of the opposing main body portion 31 of the implement, which engages the opposite face of the channel flange '23, as can be seen in Figures 2, 3 and 4. The adjustment screw 49 can be turned to compensate for any irregularities, or to take up wear, so that the toggle can be swung through the dead center into and out of lockin position. To ensure the application of the implement in proper relation with respect to the recesses 34 and 36, the main body 3'! may be fitted with, a registering pin 53 which enters registering perforations 54, 550i the flange 23 and sidewall 21 respectively.

The body portion 3'! of the implement has a groove 56 extending across its gripping face to receive and guide the suspension wire 32. This roove 55 terminates in a wall 51 which serves as a stop or abutment for the projecting end of the suspension wire 32. Beneath this groove 56, the body portion 31 is chambered at 58 to receive a plunger 59 carrying a bending die 60 whose outer end is concave to embrace the suspension wire 32 immediately adjacent the registered recesses 34 and 36 of the channel flange 23 and the side wall 21. Actuation of the bending plunger 59 toward these recesses 34 and 35 from the normal position shown in Figure 2 to the position shown in Figure 3 deflects a loop of the suspension wire 32 through the recesses 34, 36 where it can be secured by a wedge pin 6|, as shown in the lower part of Figure 1. To actuate the plunger 59, I prefer to employ a rack and pinion connection such as illustrated in Figure 4. Thus the plunger 59 is formed with the rack 52 engaged by the teeth of a pinion E3 fixed on a pinion shaft 64 (Figures 2, 3' and 4) a T is pinion shaft 4 64 projects from the body portion 37, and its projecting end is fitted with an operating lever 65. A journal plate 65 surrounding the shaft 64- may be secured by screws 6? to the face of the: body portion 31. This plate has an inner collar 68 (Figures 2 and 3) which abuts against the pinion 33 to hold the latter in its proper position.

Th plunger 59 has a perforated lug 69 (Figures 2 and 3) projecting rigidly from one side thereof to receive a rod '13. This rod has a roughened wire-gripping end H projectable into the groove 56 through an aperture of the main body portion 31. It also has a fixed collar 12 behind which is disposed a coil spring '13 confined between the collar 12 and the perforated lug 65. A stop collar 14 may be secured on the rear end of the rod Hi to engage the lug 69 for retracting the rod when the wire-bending plunger is retracted, so as to keep the rod out of the path of the suspension wire 32 when the implement is being placed in position on the flange 23 of the channel and the side wall 21. It will be apparent that the rod H1 will be resiliently urged forward as the plunger 59 is actuated to deflect the wire, thus causing the rod 13 to grip the wire and hold it securely against displacement of its intermediate portion while its projecting end is being bent into the loop form shown in Figure 3. The performance of this operation at the two ends of each suspension wire 32 simultaneously locks the channel and the two side walls to each other and to the supporting I-beam which they enclose. Wedge pins BI (see Figure 1) are inserted in the loops outside the side walls of the form, after the plunger 59 has been withdrawn. The implement may then be removed and applied to the next position where a suspension'wire 32 is to be installed. Three of these suspension wires 32'are seen on each of the supporting I-beams shown in Figure 1 of the drawing. The frequency of their occurrence will, of course, depend upon their strength and the magnitude of the load which they must support. For this reason, the perforations 30. 3! of the channel web, the recesses 33, 34 in the channel flanges and the recesses 35,36 in the side walls are provided in proper registration with each other at regular intervals where it may be necessary to apply suspension wires 32.

Figures 5 and 6 show'an additional locking device for securing the channel flanges to the side walls, if desired. This device comprises a .T-shaped clip 1'5 which may be struck out of sheet metal of suitable gauge so as to pass through recesses 16 and 11 of the channel flanges 22, 23 and the side walls'ZB, 21 which are disposed at intervals between the suspension wire recesses already described. These T-shaped clips are perforated at 18 to receive'wedge pins 19. In Figure 1, I have shown by way of example provision for two of these supplementary locking devices between each'two suspension wires. The recesses in the channel flanges and side walls for receiving the suspension wires and the T shaped clips ean be, and preferably are, alike, so that either suspension wires or clips may be employed where the recesses occur. The perforations 30, 3| in the channel webs should also occur where the recesses in the channel flanges and side walls are provided.

The apparatus thus far described in detail pertains mainly to the assembly of the beam forms and their securing on the supporting I-beam. T e side walls 2B,.2'l and the inverted channel ceiving and supporting the floor forms.

comprising the web 21 and flanges .22., 1.3 constitute the :beam form :into which concrete is to "he poured around the :Iebeam 20.

.InFigure 15, :a slight modification :ofthe construction above described is illustrated. in this modification, provision is made i-iiorrspacing the inverted channel at a prescribed distanceibelow the I-beam. Thus,zthe beam Eform comprisesside walls 80, BI and the inverted channelihavingathe web 182 with dependent flanges 8.3, :81. .Ihewdb :82 of the inverted channel is in this embodiment recessed at intervals to receive the tongues 85 of spacer plates 86 which are notched a 81 te receive the base flange of :the l beam 38. The tongues '85 of the spacer plates 86 maybe welded,

riveted or otherwise secured in the web 82 of the .:.channel. Here again the parts constituting the beam trough or form are secured to each other and suspended from the supporting I-beambya suspension wire indicated at 89, substantially as already described.

eral they comprise web or panel portions stiffening frames or walls. In some cases the web or panel portions maybe separate and 're- I'I movable, especially where they are of, for example, plywood mounted in metal stiffening frames. In other cases, the web or panel portion and the stiffening frames may beef-unitary,

all-metal construction. Figures 7, 8, 9 and 10 illustrate an embodimentin which the floor forms have separate plywood panels '90 removably seated in protective, sheet :metal stifiening frames having side and end walls 9 and panel supporting flanges v9.2. The frame is .tormed by first folding the sheet metal stock upon itself, to provide double side wall thickness, and then at right angles to provide the sunken, panel-support'ing flanges, as clearly seen in Figure '9. The flanges :92 are cut away at intervals to permit thefold ing of the stock into a rectangular frame with the panel flanges 92 meeting at the corners on a miter, as indicated at 93. The walls 91 arerecesse'd at 94 to admit T-shaped clips 95 perforated at 96 to receive the wedges 91, for locking together the walls of two adjacent floor forms, as shown in Figures 9 and 10. Perforations 98 (see Figure 8) alternate with the recesses 94 to receive the registering pin 53 of the previouslydescribed bending implement shown in Figures 2, 3 and 4, where the frames are to be locked together by the looping of a tie wire as described in connection with the use of the suspension wire 32.

The use of the floor forms of the type shown in Figures '7, 8, 9 and 10 is illustratedin the construction shown in Figure 1. Here it vwill'be seen that the floor forms are laid on thashelf plates 28, 29 of adjacent beam forms-after which the concrete 0!! is poured over the fioorforfms and into the troughs of the beam forms and levelled off to form the true floor surface.

In place of the particular construction of floor forms shown in Figures 1, '7, 8, 9 and 10, I may employ other types of floor forms, for example any of the all-metal floor forms illustrated in Figures 11, 12, 13 and 14. In Figures 11 and 12, for example, the form comprises'the metal panel I00 which is welded onto the longitudinal stifiening walls IOI, I02 and I03 and to the end walls.

salsa-m4 1101., 11110.5. The :end wallsrzlfl, I 05 :maybe simple rolled plates, whereas the; longitudinal walls I01! .1102 :and :I 03sarefoldedmetalwwithtfianges I06, I 01 "H3 8 :and 10.9. The flanges, I06, 100 are turned inward, whereas the flanges I01, I408 are turned outward, The flange arrangement on the side walls IM, .1103 :is important 'to enable the side walls :of adjacent :forms to contact each other when .laid :on the supporting shelves 32.8., .29 (Figures '1 and so that they may be secured together iayathe 'T-:s'hapedclips 95 or other seicm'ing :means. For :this purpose, the side walls are provided with the recesses 110, III and the perforations .I I2, 2| I13 similar "to those already described. The longitudinal stiffening wall I02 may likewise 'be provided with similar recesses il ldandperforationsililfi, and the end walls I04, -I 05tmay be provided with corresponding recesses I I-'6, M! and perforations H8, H9 to be available for use' where special connections are -to be made.

Figures -13;and'1-4. illustrate two further modifications of the floor form, these embodiments having mtegral panel and side walls of folded sheet metal construction. In Figure 13,, the sheet "metal stock is foldedto provide the panel 42 9 with sidewalls I2 I, I22, whereas in Figure '14 the sheet metal stock is folded to provide the panel I 23 andsidewalls 124, I25. In each case, thepane'l may be reenforced by a folded sheet metal flange 126 or I21, welded to the under surface of the respective panel. The metal is folded inward to form the side walls =I2I, I22 in Figure '13, whereas it is folded outward to form the side walls I24, I 2 5 in Figure 14. End walls, similar to thoseshown in Figure 11, may be employed in the =constructions shown in Figures 13 and i4, ifdes ired. All the walls and flanges may be understood to have the recesses and perforations for interconnection by means of the T-shaped clips or other securing means such as heretofore described.

Regardless of the particular construction of floor forms employed, it will be apparent from the example shown in Figure 1' that they are intendedto bridge the spaces between successive I-beams hybeing laid upon the shelf brackets 28, 29 to receive and support'theconcr-ete fill, as alreadydescr-ibed. It will be understood that after the concrete has been poured upon the floor forms and into the beam forms and properly levelled over the exposed floor surface, it is permitted to set for the proper length of time to become self sustaining. Thereafter, the various securing pins or wedges are removed, the T-shaped clips driven out and the suspension wires 32 severed Where exposed, so as to permit the disconnection and removal of the various form members. It will be noted that all these operations are readily performed from below the concrete without the necessity of disturbing or marring the exposed floor surface. The parts of the forms may then be applied to the production of succeeding floor units.

Any of the floor forms shown and described can be applied to the construction of vertical walls and columns. In such applications, the panel would, of course, be directed toward the concrete fill, and the stiiiening walls and flanges would be directed outward. In the case of extended walls, a number of the forms may be placed adjacent to each other and locked together by the T-shaped metal clips and wedge pins or 7 the constructionpf concrete walls is illustrated in Figure 17. In this embodiment, tie rods I28 pass through perforations I29 in the panels or webs I30 and I3I adjacent stifiening flanges I32 and I33 which are recessed at I34 and I35 and perforated at I36, substantially as already described in connection with the recesses and perforations in the stiffening flange I 02 shown'in Figure 11. The perforations I36 are intended to receive the registering pin 53 of the wire-bending implement, previously described, which operates upon the tie rod I28 to deflect a loop through the recess in the stiffening flange, which loop is then locked by the insertion of a wedge pin I31. All the stifiening walls and flanges of the form units illustrated in Figure 17 are preferably equipped with similar recesses and registering perforations to fit them for the reception of locking clips 95, tie rods I28 or other securing means. Figure 17 illustrates the use of tie rods for locking the two opposing form walls in proper relation to each other to maintain the correct pouring space between them. This particular-feature is embodied in my previous patent application above mentioned. Figure 1'7 also shows a type ofwall form which may be employed to simulate a stepped or clapboard effect in the outer wall. This effect is obtained by rolling the sheet metal stock into channel form in which the web portion I 3! adjoins a folded upper flange I38 of greater width and a rolled lower flange I39 of'less width. The effect is plainly discernible in the drawing. Between these upper and lower flanges I38 and I39, the stiffening flanges I33 are connected by welding or riveting to the web I3I. These stiffening webs 133 are of foldedmetal similar to the stiffening flanges I92, I26 and I2? previously described, but are tapered from top to bottom to correspond with the widths of the upper and lower flanges I38, I39.'

I claim: v

1. A concrete form and support comprising in combination a supporting beam, an inverted channel disposed in substantially parallel relation beneath said supporting beam, side walls disposed against the outer faces of the channel flanges and extending upward above the channel Web to provide therewith a trough to receive the concrete, and a suspension Wire hung over the supporting beam and'passing downward through the channel web and outward through the channel flanges and the adjacent side walls to suspend the assembled members from the top of the supporting beam.

2. A concrete form and support comprising in combination a supporting beam, an inverted channel disposed in substantially parallel rela tion beneath said supporting beam, side walls disposed against the 'outer faces of the channel flanges and extending upward above the channel webto provide therewith a trough to receive the concrete, a suspension wire hung over the sup porting beam and passing downward through the channel web and looped outward through recesses inthe channel flanges and the adjacent side wall, and pins in the loop portions of said suspension wire outside said side walls to lock the members in assembled relation.

3. A concrete form and support comprising in combination a supporting beam, an inverted channel disposed in substantially parallel relation beneath said supporting beam, side walls disposed. against the outer faces of the channel flanges andextending upward above the channel web to provide therewith a trough to receive the concrete,.said channel web, channel flanges and side walls provided with registering apertures, and a suspension wire hung over the supporting beam andpassing by way of said apertures downward through the channel web and outward through the channel flanges and the adjacent side walls to suspend the assembled members fromthe-top of the supporting beam.

JOSEPH J. PIRZ.

REFERENCES CITED The following references are of record in the file of this patent:

.UNITED STATES PATENTS Number Name Date 1,461,409 -White July 10, 1923 1,763,483 Seward et al June 10, 1930 1,965,686 Bruce July 10, 1934 2,151,210 Jennings Mar. 21, 1939 2,236,616 Bosco Apr. 1, 1941 2,336,253 Jennings Dec. '7. 1943 

